Stripping apparatus



March 26, 1929. D. G.ANDERSQN 1,706,724

STRIPPING APPARATUS Filed July 27, 1927 Patented Mar. 26, 1929.

' UNITED STATES 1,706,724 PATENT OFFICE.

DAVID GUSTAF ANDERSON, or onrcaeo, ILLINOIS, Assrenort 'ro WESTERN, ELEo'rnIc' COMPANY, INCORPORATED, OENEW YORK, N. Y., A 'conroRA'rron on NEW YO K,

smrrrme PPARATUS.

Application filed m '27,

This invention relates to stripping apparatus, and more particularly to apparatus for stripping or ejecting castings from their hard baked sand molds. I Y i The primary object of ,the'invention is to rovide a simple and durable means for expeditiously stripping members from containers. r v v In accordance with the general features of the invention, prises a pair of levers each provided at one extremity with a chain for connection with a crane'hook. These levers are pivoted 1n fixed spaced position to a horizontal support or frame and are designed'to engage a casting at theirlower extremities. Depend ng from the frame are extensible llnks which engage opposite portions of a molding p. and when the apparatus is properly associated with the flask, an upward pull on the lever chains will eifect thev positive stripping of a casting from the flask. c

f The objectsof the invent on will be more apparent from the follow ng detalled de; scription taken in connection with the accompanying drawings, wherein r Fig. 1 is a side elevatlonal View of a stripping mechanism representing one embodiment of the invention which is shown in association with a molding flask; v

Fig. 2 is a side elevational view s1m1lar to thatdisclosed in Fig. 1, showing the relative position of the levers after the flask has been raised, and

Fig. 3 is a plan view of the apparatus as viewed along the line 3-3 of Fig. 1.

Referring now to the drawing wherein like numerals have been employed to designate similar parts throughout the various figures, it will be observed that a pa1r of levers 10 are pivoted at 11 to a horizontally disposed frame or support 12 which includes a pair of spaced channel members 14. The upper or outer extremities of the levers 10 are connected with chains 15 which are designed for connection with a conventional crane hook 16 through the medium of a link 17 (Fig. 1). The lower extremities of the levers 10 are provided with rollers 19 and it will be apparent that when the levers';10 are moved from the position shown in Fig. 1 into the position shown in Fig. 2, the rollers 19 will be moved downwardly. Lugs 20 formed on each of the levers serve to preone embodiment thereof com- 1927. Serial No. 208,700.

vent the upward swing thereof beyond the positionsas shown in Fig. 2.

A cylindrical. casting container or mold flask 21 is disclosed in position immediately beneath the frame 12 with a pair of channel members 23 secured transversely of the frame 12 resting upon the upper surface of the cylindricalflask. When the frame 12 is carried into association with the u per end of. the flask 21, the rollers19 on t e levers 10 will rest upon the upper end of a casting 24 within the flask as clearly shownsin Fig. 1. The container I or flask. 21 is formed with diametrically opposed trunnions 25 which serve as a convenient means to facilitate the lifting thereof by conventional hoisting apparatus.

Extensible link members 27 are employed to connect the trunnions 25 with the frame 12. The upper ends of these links 27 may be readily associated with companion hooks 28 which are pivotally supported at each end of the frame 12, andthe lower extremities of the links are adapted to be associated with grooves provided in the companion trunnions 25. Having the links 27 extensible and adapted for convenient association .with the hooks 28 and the trunnions 25as just described, makesit possible to employ the stripping apparatus for use in connection with molding flasks of various sizes. After the frame12has been properly associated with the flask 21 and the linkrmembers connected between the trunnions' 25 and the hooks 28, it is only necessary toraise the.

crane hook 16 to cause the positive stripping or ejection of the casting 24 from the hard baked sand within the flask as clearly shown inFig.2., v By having the levers 10 pivoted in a fixed spaced relation to the rigid frame 12 and by providing the convenient means for connecting the levers with a crane hook, a unitary and compact device is presented which may be quickly and easily moved about a foundry from one flask to another with a minimum number of manual operations. The rigidly constructed and balanced frame 12 may be readily associated with the upper end of the molds which are to be stripped as clearly described and the links 27 provide a very simple, yet rigid means for interconnecting the frame 12 withflasks of different dimensions. The invention provides a stripping I frame links and levers as distin uished from collapsible types of lifting mechanisms which necessitate a considerable number of operations and adjusting manipulations in order to properly associate the apparatus with the parts to be lifted.

Although the invention has herein been described in connection with the stripping of castings from a particular type of molding flask, it is to be understood that the invention is capable of many other applications and should, therefore, be only limited by the scope of the appended claims.

What is claimed is:

1. In apparatus for stripping a member from a container, a frame detaehably connectible with a container, and a fuleruined member supported by the frame which is adapted when moved to directly engage and eject a member from the container.

.2. In apparatus for stripping a member from a container, a frame detachably connectible with a container, and a lever pivoted to the frame which is adapted when -moved to directly engage and eject a memher from the container.

3. In apparatus for stripping a member from a container, asupport, an ejecting leverage mechanism pivoted thereto, and extensible means for connecting the support with a container.

4. In apparatus for stripping a member from a container, a horizontally disposed support, an ejecting leverage mechanism pivoted thereto adapted to directly engage a member to be stripped from the container, and means at the ends of the support for detachable connection with a container.

5. In apparatus for stripping a member from a container, a rigid support, ejecting members pivoted in fixed spaced relation to the support for directly engaging a member to be stripped from the container, and means for detachably connecting the support to a container.

6. In apparatus for stripping a casting from mold flask, a frame, a pair of" levers pivoted to the frame for directly engaging and ejecting a casting from a mold flask, and extensible link elements supported by the frame for connecting the frame with the mold flask.

7. In apparatus for stripping a casting from a mold flask, a horizontally disposed frame for traversing and engaging a mold flask, a pair of ejecting levers pivoted in spaced relation to the frame, a rollerat one end of each of the lovers adapted for'engagement with a casting within the flask,.and means at the other end for association with a hoisting mechanism. I

8. In apparatus for stripping a casing J1. L V more a mold ilask, a horizontally disposed frame for traversing and engagmg a mold flask, apair ofe ecting levers pivoted in end of each of the levers adapted for-engagew ment with a casting within the flask, means at the other end of the levers for, association with a hoisting mechanism, and extensible link elements supported by the frame for connecting-the frame with the mold flask. 1

9, In apparatus for stripping a casing from a mold flask, a pair of horizontally disposed channel irons for traversing 'and engaging a mold flask, a pair of ejecting levers pivoted in spaced relation to the channel irons, a roller at one end. of eachofthe leversadapted for engagement with a. castspaced relation to the frame, a roller at one ing within the flask, means at the other end I of the levers for association with ahoi'sting mechanism, hooks mounted at each end .of i

the pair of channel irons, and extensible means for connecting the hooks to trunnions fixed to the flask. i

p In witness whereof, I hereunto subscribe my name this 16 day of July, A. D; 1927.

DAVID GUSTAF ANDERSON. 

